Queen Silvia of Sweden chose diamonds for the event as well. She wore the Baden Fringe Tiara with the Karl Johan Earrings and a diamond necklace. Intriguingly, both Margrethe's and Silvia's tiaras come from the same source: Victoria of Baden, who was the great-grandmother of both Margrethe and Silvia's husband, King Carl XVI Gustaf.

And although she's not royal, I knew you'd all want to see this gorgeous modern demi-parure, worn by Jenni Haukio, the First Lady of Finland. Doesn't this look like it came straight from Sophie Wessex's jewelry box?

NOTE: I've been sent numerous messages arguing about the stones in Jenni Haukio's demi-parure, which is a recent gift and is intended to be worn by present and future government representatives. Some have insisted that the stones are beryls, while others indicate that they are, more specifically, aquamarines (a form of beryl). I suspect some of the confusion here results from translation from Finnish media reports. No need to send me further tweets and emails on this one!